I use a piece of lined notebook paper so that I can fairly accurately measure distances too. There are probably people out there who can do it, but the symmetry isn't only by eye. Otherwise yeah, just art pencils and art paper

Oh my, I can't stress enough how much I adore this. The phoenix and ouroboros are two of my favorite creatures, and I actually plan on getting a small ouroboros tattoo in the shape of an infinity if I ever get one, so yes... I absolutely /love/ this.